Anna Marie Clemens Dunbar, 77, who was active in Catholic Church affairs in the Washington area, died at Suburban Hospital in Bethesda on Monday following a heart attack.

Mrs. Dunbar was born in St. Louis, Mo. She moved to Washington in 1921 to take a job with the Department of Agriculture. She later worked for the Czechoslovak Diplomatic legation.

In 1924, she married John T. Dunbar and the couple moved to Baltimore. They returned to the Washington area in 1942.In 1948, Mrs. Dunbar worked as a secretary at Montgomery College. For several years beginning about 1960, she was a senior secretary in the patent office of the Burroughs Corp. in Washington.

She was a member of the parishes of Our Lady of Lourdes Catholic Church in Bethesda and of the Holy Cross Catholic Church in Garrett Park.

She was a member of the Sodality of Our Lady, the Third Order of St. Francis and the Legion of Mary. She also was a sacristan in the Chaplain's office of the National Naval Medical Center at Bethesda. She was a member of the Right to Life and Birthright organizations.

Her husband died in 1962.

Survivors include five daughters, Dorothy Kehoe, of Washington, Ethel Doherty, of Winchester, Va., Ann Duchesne, of Silver spring, Rita Buckingham, of Potomac, and Ellen Syquia, of Manila, the Philippines; one sister, dolores Steffen, of St. Louis, Mo.; 30 grandchildren, and four great-grandchildren.

The family suggests that expressions os sympathy be in the form of contributions to the National Children's Medical Center, Washington.